My primary header pipes are nearly 16 years old. They were hot-coated from day one. They have been wrapped for 13 years or more. The last time I re-wrapped them was 2 years ago. The pipes did not show evidence of deterioration, at all. They may outlast me. I turn 57 next week.
If I had wrapped un-coated pipes 13 years ago, I expect they would have failed years back.
David